Class: DynarexBlog

Inherits:
Object
  • Object
show all
Defined in:
lib/dynarex-blog.rb

Constant Summary collapse

ENTITIES = 
'entities.xml'

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file_path = './') ⇒ DynarexBlog

Returns a new instance of DynarexBlog.



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# File 'lib/dynarex-blog.rb', line 15

def initialize(file_path='./')
  @file_path = file_path[/\/$/] ? file_path : file_path + '/'
  if File.exists? (@file_path + 'index.xml') then  open(@file_path) else fresh_start() end
  @current_lookup = '_entry_lookup.xml'
  @hc_lookup = HashCache.new(size: 15)

  @hc_lookup.read(@current_lookup) { Rexle.new File.open(@file_path + @current_lookup,'r').read }
  
  @hc_result = HashCache.new(size: 10)
  @hc_entry_file = HashCache.new(size: 10)
  @hc_lookup_a = HashCache.new(size: 10)
  
  xpath = "records/section[summary/name='tags']/records/entity/summary"
  @tags = @entities.xpath(xpath){|e| [e.text('name'), e.text('count')]}
  super()
end

Instance Attribute Details

#id ⇒ Object

Returns the value of attribute id.



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# File 'lib/dynarex-blog.rb', line 13

def id
  @id
end

Instance Method Details

#create_entry(record = {}) ⇒ Object 



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# File 'lib/dynarex-blog.rb', line 32

def create_entry(record={})

  if record.has_key? :title then
    lookup = '_entry_lookup.xml'
    doc = Rexle.new File.open(@file_path + lookup,'r').read
    if doc.element("records/entry[uri='#{format_uri(record[:title])}']") then
    raise "err: create_entry: Duplicate title found"
    end
  end

  @hc_result.reset
  @id += 1
  # create a new record
  @index.create record, @id

  # if there is more than 10 records shift the 1st record.
  if @index.flat_records.length > 10 then
    # '+++ deleting the 1st index record +++'
    @index.to_doc.delete('records/*[1]')
  end

  @index.save

  create_record(record, @id.to_s, name='_entry', type='main')


  if record[:tags] then
    record[:tags].split(/\s/).each do |tag|
      create_record(record, @id.to_s, name=tag, type='tags')
    end
  end    

end

#delete(id = '') ⇒ Object 



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# File 'lib/dynarex-blog.rb', line 122

def delete(id='')

  # delete from the tags files (entry and lookup), the entry file and lookup
  # look the id up in lookup.xml

  lookup = Dynarex.new @file_path + @current_lookup
  lookup_id = lookup.records[id][:id]
  file = lookup.records[id][:body][:file]
  
  dynarex = Dynarex.new(@file_path + file)    
  tags = dynarex.record(id).tags.split(/\s/)
  dynarex.delete(id).save

  lookup.delete(lookup_id).save

  tags.each do |tag_name|
    # find the lookup
    delete_entry(tag_name, id)
  end

  # start of reindexing

  if index_include? id then

    count = @index.xpath('count(records/entry)')

    if count < 10 then
      @index.delete(id)
      @index.save
    else
      refresh_index     
    end
  end
end

#entry(id) ⇒ Object 



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# File 'lib/dynarex-blog.rb', line 66

def entry(id)

  doc_lookup = @hc_lookup.read(@current_lookup) { Rexle.new File.open(@file_path + @current_lookup,'r').read }
  file = doc_lookup.text("records/entry[id='#{id}']/file")
  doc_entries = Rexle.new(@hc_entry_file.read(file) { File.open(@file_path + file,'r').read })

  doc_entries.element("records/entry[@id='#{id}']")
end

#fresh_start ⇒ Object 



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# File 'lib/dynarex-blog.rb', line 157

def fresh_start()

  @id = 1
  @dynarex = new_blog_file '_entry1.xml'
  @index = new_blog_file 'index.xml'

  @entities = Polyrex.new('entities/section[name]/entity[name,count,entry_count]')

  @entities.create.section({name: 'main'}, id='main') do |create|
    create.entity(name: '_entry', count: '1')
  end

  @entities.create.section({name: 'tags'}, id='tags')
  @entities.save @file_path + ENTITIES
  @lookup = new_lookup_file '_entry_lookup.xml'

  # add the _404.xml
  dynarex = Dynarex.new('entries/entry(id,file,year,month,uri)')
  year, month = [:year, :month].map{|x| "%02d" % Time.now.method(x).call}
  dynarex.create id: '1', file: '_4041.xml', year: year, month: month
  dynarex.save '_404_lookup.xml'

  Dynarex.new('entries/entry(title,body,tags,user)').save '_4041.xml'

end

#open(file_path = './') ⇒ Object 



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# File 'lib/dynarex-blog.rb', line 183

def open(file_path='./')

  @file_path = file_path
  threads = []
  threads << Thread.new{
    @index = Dynarex.new @file_path + 'index.xml'
    @id = @index.records ? @index.records.to_a[-1][-1][:id].to_i : 0
  }
  threads << Thread.new{@entities = Polyrex.new @file_path + ENTITIES}
  threads.each {|thread| thread.join}

end

#page(number = '1') ⇒ Object 



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# File 'lib/dynarex-blog.rb', line 196

def page(number='1')
  lookup = @current_lookup

  result = nil
  
  result = @hc_result.read(lookup + number.to_s) do

    if (number.to_s == '1') and (lookup == '_entry_lookup.xml') and (@index.records.length <= 10) then 

      doc = @hc_lookup.refresh(lookup)
      r = @index.to_doc
    else

    	doc = @hc_lookup.read(lookup) { Rexle.new File.open(@file_path + lookup,'r').read }                
      r = select_page(doc, number.to_i)
      @current_lookup = '_entry_lookup.xml'
      
      # refresh to maintain _entry_lookup in the cache
      @hc_lookup.refresh(@current_lookup) 
      @hc_lookup_a.refresh(@current_lookup)
    end
    
    total_records = doc.xpath('count(records/entry)')
    return nil if total_records.nil?

    total_pages, remainder = %w(/ %).map {|x| total_records.send x, 10}
    total_pages += 1 if remainder > 0      
    
    summary = {
      total_records: total_records,
      page_number: number,
      total_pages: total_pages
    }
    
    summary.each do |name, text|
      r.element('summary').add Rexle::Element.new(name.to_s).add_text(text.to_s)    
    end    
    
    r
  end
  
  @current_lookup = '_entry_lookup.xml'
  
  result
end

#rebuild_index ⇒ Object 



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# File 'lib/dynarex-blog.rb', line 251

def rebuild_index()
  refresh_index()
end

#tag(tag) ⇒ Object 



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# File 'lib/dynarex-blog.rb', line 242

def tag(tag)      
  @current_lookup = (@tags.assoc(tag) ? tag  : '_404') + '_lookup.xml'      
  self
end

#tags ⇒ Object 



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# File 'lib/dynarex-blog.rb', line 247

def tags
  @tags
end

#update(id, h) ⇒ Object 



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# File 'lib/dynarex-blog.rb', line 75

def update(id, h)

  puts '@current_looup ' + @current_lookup
  puts 'id : ' + id.to_s
 
  lookup = Dynarex.new @file_path + @current_lookup
  puts 'records : ' + lookup.records.inspect
  lookup_id = lookup.records[id][:id]
  file = lookup.records[id][:body][:file]

  reset_cache_entry(@current_lookup, file)
  
  dynarex = Dynarex.new(@file_path + file) 
  prev_tags = dynarex.record(id).tags
  
  if h[:tags] and h[:tags].length > 0 then
    
    a = h[:tags].split(/\s/)
  
    if prev_tags and prev_tags.length > 0 then
	
      b = prev_tags.split(/\s/)
      old_list = a - b # tags to be deleted
      new_list = b - a # tags to be inserted

      old_list.each {|tag_name| delete_entry(tag_name, id) }
      common = a.to_set.intersection(b).to_a # tags to be updated     
      common.each {|name|  update_entry(name, id, h) }
    else
      new_list = a
    end
    
    new_list.each {|tag| create_record(h, id, name=tag, type='tags') }
    dynarex.update(id, h)
    puts 'dynarex : ' + dynarex.to_xml
    puts 'saving: ' + @file_path + file
    dynarex.save
  end
  
  lookup.update(lookup_id, uri: h[:title].gsub(/\s/,'-')).save

  @hc_lookup.write(@current_lookup) { Rexle.new File.open(@file_path + @current_lookup,'r').read }                

  (puts "rebuilding index #@file_path} ... "; refresh_index) if index_include? id

end